I never understood why someone would come up with a title like "Soldier Of Fortune".

"Gambler Of Fortune", yes, but soldier ? What has Fortune to do with being a soldier ? Is someone especially lucky because he or she is a soldier ?

Would it be the same if I said "Hitman Of Fortune" or "Assassin Of Fortune" ?

— “ Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius – and a lot of courage – to move in the opposite direction.“ (E.F.Schumacher, Economist, Source)